Here's a question - do your masters you plan on using have these test tones? A number of the masters I have do. If your's don't, how do you know if the machine they were recorded on was in fact in calibration that day? Once the tones are on the tape with the original material they are ALWAYS there "thru thick and thin" - even if the subsequent playback/recording (dubbing) chain is in fact slightly?? out of EQ.
Charles,
The tapes that we use as a starting point are the original session tapes. Generally they have tones included. I believe that it's a good policy to record project tones at the start of any recording or mix project...that's the way I was trained and that's the way I've been doing it for over thirty years. And yes, I agree with you that these tones should always stay with the tapes. This may not be obvious to some readers, but for me it's second nature now. When I start a recording project on tape, I align the machine using a standard test tape (I have many from MRL, STL and even Ampex). Then once the record side is aligned, I print a set of tones that stay with the tapes. I started doing this way back in my first studio, but I really had it drilled into me during the years I worked for Columbia Records. Some years back SPARS, the Society of Professional Audio Recording Services, standardised the tones to be used: 1K, 10K, 15K, 100, and 50 Hz. This is fine with me, and that's what I generally use. The two HF tones give you both a reference for frequency response and a pair of tones for azimuth that are not harmonically related (long story for another day). The two low frequency tones give you a fighting chance of understanding what's going on with the head bumps.
Anyway, this is about the original tapes. I'm feeling the pull to start telling some of the many tales about what we have actually found on tapes coming in...but that's a whole 'nuther thread. When I get a chance I'll start a "War Stories" thread in the Tape Tech part of this forum.